选择括号内恰当的单词或词组填入空白处，使句意完整、正确。

小题1:Mr Brown,                （this / that）is my mom.

小题2:They                （has / have）round faces.

小题3:              （Who’s / Whose）bananas are these?

小题4:              （Sorry / Excuse me）, I don’t know her.

小题5:A man has two                （foots / feet）.

稳态血药浓度